update architecture diagram (#388)

* initial commit of chatbot developer workshop

* add intro and some images

* Add first lab

* add deploy sample app lab

* add draft of Lab 3

* Add OIC lab

* update lab folder name and manifest files

* Update ODA lab

* add demo, update/revise labs 1,2,3

* update lab 3

* update lab 5

* update lab 5

* update picture for correct skills

* updates/revisions

* Update apex.md

* Update apex.md

* Update rest_select_ai.md

* Add files via upload

* Update introduction.md

* Add files via upload

* Update introduction.md

* Update oda.md

* Update oda_rest_db_select_ai_test.png

* Add files via upload

* Add files via upload

* Add files via upload

* Update oda.md

* Update oda.md

* combine labs 1/2

* Update apex.md

* update demo

* Update user.md

* update SELECT AI text

* self-qa fix

* fix image reference

* self-qa grammar/typo edits

* update title

* update for ODA IAM Policies

* last minute case update

* update task numbering

* Update chatbot_developer_arch.png

update label in architecture diagram

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Co-authored-by: kaushik-kundu <kaushik.kundu@oracle.com>

Author: jaddjennings